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Author Topic: overspinning a hard drive  (Read 3136 times)

simsicle

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overspinning a hard drive
« Reply #10 on: July 11, 2004, 12:47:51 AM »

Perhaps you could open it, desolder the motor's leads (or cut the wires, if that is the case) and hook up your 12v power directly to it.
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64-bit-rules

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overspinning a hard drive
« Reply #11 on: July 11, 2004, 01:07:47 AM »

you understand, that the motor is ac current, and i have dc current... tell me an easy way to get 15 volts ac and then ill be happy
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64-bit-rules

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overspinning a hard drive
« Reply #12 on: July 11, 2004, 01:10:17 AM »

gilgalad: thats a good idea, ill try it, ill just put the 12+5 volts together and put it through the 12v and  put a different 5v into the 5 socket
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BalefireX

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overspinning a hard drive
« Reply #13 on: July 11, 2004, 01:21:19 AM »

I am nearly certain that hard drive motors are DC, and that the extra wires are for a feedback loop to make sure that it is spinning at exactly the correct RPM.  Also, if you connect the 12v and 5v wires of your molex, you dont get 17v. You can't add voltages, since voltage is difference, and not knowing that basic electronic fact makes me very skeptical of your AC comment.
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Cranberry

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overspinning a hard drive
« Reply #14 on: July 11, 2004, 03:36:38 AM »

I beleive this is what you are looking for:

http://afrotechmods.com/hdoc.htm
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MaxamusCrasious

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overspinning a hard drive
« Reply #15 on: July 11, 2004, 09:35:33 AM »

um... if you want to spin things fast, why not go to a electronics surplus store like www.allelectronics.com and  just buy a nice big ac or dc motor? Then all you would have to to is bolt the platters to the shaft...
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monkey_sass

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overspinning a hard drive
« Reply #16 on: July 11, 2004, 03:56:26 PM »

Quote from: BalefireX
I am nearly certain that hard drive motors are DC, and that the extra wires are for a feedback loop to make sure that it is spinning at exactly the correct RPM.  Also, if you connect the 12v and 5v wires of your molex, you dont get 17v. You can't add voltages, since voltage is difference, and not knowing that basic electronic fact makes me very skeptical of your AC comment.



Yeah.  12v + 5v = 7v.  Old trick.  I even think there was a thread about that a while ago.
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BalefireX

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overspinning a hard drive
« Reply #17 on: July 11, 2004, 04:19:42 PM »

Quote from: monkey_sass

Yeah.  12v + 5v = 7v.  Old trick.  I even think there was a thread about that a while ago.


Its not really 12v PLUS 5v, its 12v TO 5v... You are replacing the ground with the 5v line.  Because Ground = 0, when you go 12v to ground, you have a difference of 12v (the device is getting 12v)  when you go from 12v to 5v, you have a difference of 7v (so the device gets 7v)

If you were to connect the 12v directly to the 5v and then try to connect the other side to ground, your PSU wouldn't be happy.
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pinkpanther

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overspinning a hard drive
« Reply #18 on: July 11, 2004, 04:27:53 PM »

I could be smoking crack or something, but wasn't this really popular in the very early days of overclocking and then came back with underclocking?  I think I remember reading somewhere you can do this through software.  Someone actually wrote some firmwave stuff that would let you just pick a number and it would spin the hard drive that fast.  I have no idea where.
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BalefireX

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overspinning a hard drive
« Reply #19 on: July 11, 2004, 04:51:56 PM »

I'm voting for crack.  If you change the rotational speed of a HDD, it will be unable to read or write correctly, as it is hardwired to work at exactly one speed (and exactly that speed.. ie, 7200rpm, not 7699, not 7201)
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